25573729 has 8 divisors (see below), whose sum is σ = 27952128. Its totient is φ = 23292480.

The previous prime is 25573663. The next prime is 25573733. The reversal of 25573729 is 92737552.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25573729 - 2¹³ = 25565537 is a prime.

It is a super-2 number, since 2×25573729² = 1308031229930882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25573691 and 25573700.

It is not an unprimeable number, because it can be changed into a prime (25573739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23737 + ... + 24790.

It is an arithmetic number, because the mean of its divisors is an integer number (3494016).

Almost surely, 2^25573729 is an apocalyptic number.

It is an amenable number.

25573729 is a deficient number, since it is larger than the sum of its proper divisors (2378399).

25573729 is a wasteful number, since it uses less digits than its factorization.

25573729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48575.

The product of its digits is 132300, while the sum is 40.

The square root of 25573729 is about 5057.0474587451. The cubic root of 25573729 is about 294.6216695610.

It can be divided in two parts, 255 and 73729, that added together give a square (73984 = 272²).

The spelling of 25573729 in words is "twenty-five million, five hundred seventy-three thousand, seven hundred twenty-nine".